/*
 * Copyright 2011 lprimak.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.flowlogix.web.components;

import org.apache.tapestry5.BindingConstants;
import org.apache.tapestry5.ComponentResources;
import org.apache.tapestry5.MarkupWriter;
import org.apache.tapestry5.annotations.Parameter;
import org.apache.tapestry5.ioc.annotations.Inject;

/**
 * Writes an empty element, usually a &lt;span&gt;
 * This is for DreamWeaver fidelity, like DynImg
 * The body of the element is rendered, but informal arguments are not
 * 
 * <a href="http://code.google.com/p/flowlogix/wiki/TLEmptyComponent"
 *    target="_blank">See Documentation</a>
 * 
 * @author lprimak
 */
public class Empty
{
    public void beginRender(MarkupWriter writer)
    {
        writer.element(element != null? element : cr.getElementName());
    }

    
    public void afterRender(MarkupWriter writer)
    {
        writer.end();
    }
    
    
    private @Parameter(defaultPrefix = BindingConstants.LITERAL) String element;
    private @Inject ComponentResources cr;
}
